Article Tags: ClimateGate, Dexter Wright
One of the more enlightening e-mails to spill out of the Climategate scandal is a report on the progress of Siberian fossilized tree ring work. The report, dated October 9, 1998, focuses on some two thousand samples of fossilized trees thirty-three nautical miles north of the present-day Arctic Circle. The report attempts to correlate the migration, north and south, of the tree line with annual tree ring dating so that an actual year can be assigned to a certain location of the Arctic Circle. The report correctly states that there has been migration of the polar tree line over the past several thousand years, but the investigators attribute this migration singularly to the cold tolerances of tree species.
Although the botanists are correct that cold tolerance does affect the northern limit of trees, they incorrectly attribute the migration solely to variation in climatic temperatures. This is only part of the answer. The other part lies in the in the geographic fact that creates the Arctic Circle in the first place.
The location of the Arctic Circle is a function of the tilt of the Earth’s axis, which is approximately twenty-three and a half degrees (23.5o) from the orbital plane of our planet. This is why the Arctic Circle is at sixty-six and half degrees (66.5o) north latitude, exactly 23.5o south of the North Pole, which is at ninety degrees (90o) north latitude. But this angle of axis tilt has not always been 23.5o.
Source: americanthinker.com